Type-writing machine.



W. J. BARRON. TYPE WRITING MACHINE.

APPLICATION FILED APR. 18, 1906. 904,171. Patented Nov. 17, 1908.

8 SHEETS-SHEET l.

4 fliillllli W J BARRON TYPE, WRITING MACHINE.

APPLIOATION FILED APE. 18,1906. PatentedNov. 17, 1908.

8 SHEETS-SHEET 2.

1 5. va imumv =7 n 3 a K R $50 W. J. BARRON.

TYPE WRITING MACHINE.

- APPLICATION FILED APR. 18, 1906.

904,171. Patented Nov. 17,1908. i 8 SHEETS-SHEET 3.

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WITNEEEEE1= 5% %44&/. M 52% A H|5 ATTORNEY |NVENTUR= To all whom it mayconcern:

- UNITED s Atrns PATENT OFFICE.

WALTERJ. BARRON, OF NEW YORK, N. Y.', ASSIGNORTO DENSMORE TYPEWRITERCOMPAN OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING mAcnmE.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Beit known that I, IVALTER J. BARRON, citizen of the United States, andresident'of the borough of Brooklyn, in the city of New York, in thecounty of Kings and State of New York,- have invented certain new anduseful Improvements in Type-WVriting Majchines, of which the followingis a specification.

My invention relates to typewriting machines and more particularly toback spacing mechanism therefor. 7

One object of my invention is to provide a simple and efficient backspacing mechanism by which the carriage may be moved back step-by-stepina direction opposite to that in which it travels during the ordinary op-,eration of the machine.

A further object of my invention is to provide mechanism of thecharacter specified which may be employed to afford a back feed of thecarriage one or more letter space distances at a time as may be desiredat each operation.

A still further object of my invention is to provide means of thecharacter specified which are in the nature of attachments and may beapplied to existing forms of typewriting machines without changing thestructural features of said machines.

To the above and other ends which will hereinafter appear my inventionconsists in I the features of construction, arrangements of parts andcombinations of devices to be hereinafter described and particularlypointed out in-the appended claims.

In the accompanying drawings, wherein like reference characters indicatecorresponding parts in the various views, Figure 1 is an enlargedfragmentary. plan view of a Densniore typewritingmachine with theattachments of my invention shown applied thereto.

Fig. 2 is afragmentary front elevation of the upper portion of the samewith parts broken away. Figs. 3 and 4 are fragmentary detail views infront elevation and with parts broken. away of the back spacingmechanism and parts of the typewriting machine to which the attachmentsare applied. Fig. 5

a fragmentary detail plan View. of the.

ordinary es apementmechanism of the machine onan enlarged scale. Fig. 6is a rear elevation of the same. Fig. 7 is an enlarged detail framentary front elevation showing a 'mo'difie form of back spacingmechanism the rack 5.

embodying my invention. 'Fig. 8 is a like View of the same showing theparts diflerently disposed. Fig. 9 is a detail transverse sectional viewof the parts shown in Figs. 7 and 8, the section be1ng taken on the linea:;c of Fig. 8 and looking in the direction of the arrow at said line...F i 10 is a detail perspective view of a pivote a part of the structureshown in Figs. 7, 8 and 9.

In the various views parts have been omitted and parts broken away tobetter illustrate other features of the construction I have shown myinvention applied to a No. 1 Densmore machine to which the attachmentsmay be readily applied without modifying any of the structural featuresof that machine, but it should be understood that the invention may beapplied to various other styles of typewriting machines.

A top plate 1 of the machine supports a.

guide rod 2 which is surrounded by sleeves 3 that project inwardly fromthe forward ends of arms 4 connected to a carriage truck. A feed rack 5is secured to the arms 4 of the truck and cooperates with a fixed dog ordetent 6 and a loose or stepping do 7. The loose dog is slotted at 8 andheaded screws 9 extend through said slots and take into threadedopenings in a.plate 10 which consti-' tutes a dog rocker. Thisconstruction enables the loose dog to receive a longitudinal movement inthe direction of the length of A spring 11 bears at its free end againstthe loose dog and tends to force it towards the right, this spring beingpressed around a screw 12 carried by the dog rocker and secured at itsopposite ends to a screw 13.

The dog rocker 10 is pivoted on a shouldered'screw pivot 14 whichconnects the dog rocker to a bracket arm 15 fixed to a spindle 16 whichis adapted to turn on its vertical axis in a bearing 17 formed in thetop plate 1. A stop 18 is adjustably held in its hearing, in a lug 19which projects from the top late, by a screw20. A restoring spring 21 isconnected at one, end to a pin 22 whichv projects from the top plate andis connected at its oppositeend to a bracket'arm 23 on the dog rocker.The pressure of the spring 21 is effective to turn the dog rocker ar undthe vertical axis of its spindle 16 as we 1 as to turn it around itshorizontal pivot 14, thus tending normally to maintain the loose dog inthe elevated position and to force it stop forming.

its

into engagement with the feed rack 5. A

' spring drum 24 is connected to one end of a band 25, the opposite endof the band being connected to the feed rack 5 so that the, pressure ofthe spring drum tends constantl the platen is turned to inspect thewriting,

said bearings being open at the top to permit removal of the platen. Thefront cross bar 27 of the platen frame hasopenings 34 and- 35 therein.Anti-friction rollers 36 are mountedon screw pivots 37 which extendthrough the bar 27 in opposite directions and cotiperate with thetrunnions 38 of the antifriction rollers. Each of the rollers 36 iscontained in an opening 34 in the front cross bar and is received at 1tstread in a substantially V-shaped groove 39 of ashift rail 40 carried byarms 41 which are actuated by the usual or any suitable means (notshown) to effect a backward and forward'movement of the shift rail to'change the case position of the platen. During this movement the arms 30of the platenframe ride back andforth on the sleeves 3, the shift railbeing arrested in itsforward movement by the arms 41 contacting withscrew stops 42 which are received in threaded openings in arms .43 whichproject throu h the top-plate 1. A pointer 44 is carried by a bracket45secured to the shift rail by screws 46, the ointer cooperating with thecarriage sca e 47 connected by screws 48 to the front bar 27 of theplaten frame.

The dog rocker 10 is actuated in the usual manner, a depending link 49being pivoted thereto-at 50 and connected to a universal bar which isactuated at each printing movement of a finger key. During theordinaryprinting operation each depression of a finger key causes the free endof the dog' rocker to be depressed, thereby moving the dog rocker fromthe position shown in Fig. 6, releasing the loose dog 7 from the rackand bringing the'fixed dog 6 into engagement with the same tooth'whichwas engaged, by the dog 7 so that the feed-rackand thecarriagecontrolled thereby are not fed at the The release of thedown stroke ofthe key. loose dog in the manner, described enables the spring 11 toforce it f01WtL1'(l,-3S in Fig. 5, in positionto coiiperate \vitlrthenext advancing tooth of the feed rack on th' e-retiirn of the dogrocker. When pressure on the receive tension of its spring 21 and theloose dog will "engage theadvancingtooth of the feed .rack andthepressure of the carriage spring will overcome the tension of thespring 11,

thus feeding the carriage forward a letter space distance and restoringthe loose dog to the position shown in Fig. 6. During the reverse orbackward movement of the carriage the beveled edge of the loosedog willcooperate with the beveled edges of the teeth. on the feed rack and thefeed dog 7 will at this time ride freely over the teeth of the feedrack, the dog rocker at this time'moving around the axis of the spindle16 as a center, as indicated in Fig. 5. A carriage release key 51 isconnected to a bar 52 which carries forwardly extending bracket arms 53pivoted on screw pivots 54 to the arms 4 of the truck. A depression ofthe release key 51 will swing the bar 52 rearwardly about its pivots 54against a-screw stop 55 carried bythe dog rocker and will thus force thedog rocker to turn around with the pivot .16, thereby dis-.

This rack a hand. controlled pivoted device or key 59 preferably made ofsheet metal with a,

hook-like finger piece 60 thereon and-dependin sides 61. This pivoteddevice is 5 within the opening 35 in the front bar 27 oftheplaten frame,as shown in Fig. 1, and is pivoted at one end ,on.

a pivot rod 62 which extends across the opening 85 and throu h thedepending side pieces 61 of the ivote device and is secured at its endsto t e bar 27. -An arm or finger 63 projects from the pivoted device orkey 59 and is adapted to cooperate with a cross web laten frame, whichbar 64' or bar 64 of the divides the left-land opening 34 from thecenter opening The finger 63 andthe bar 64 act as stops to limit. theupward swinging movement of the pivoted device as shown in Fig. 2.Laterally projecting fingers 65 are formedon the pivoted device 59 forcooperation with the-bar 27 ofthe platen frame to dimit the downwardmovement of the pivoted device as shown in Fig. 1. The

stop 58 h'ereinbefo're referred to is mounted on the rear depending side.61 of the pivoted device 59 and'is adapted to slide thereon in thedirection of thetravel of the carriage.

A headed screw 66 extends through a slot 67 in a slidable plate likemember or carrier 68' i from one end of which the stop 58 depends,

and said screw limits the sliding movement of the stopon the pivoteddevice 59. The left-hand end of the carrier 68 is supported of'the feedrack and will en on the pivot rod 62, the carrier being cut out at 69for this purpose. A laterally projecting pinTOextends from the carrierand a contractile spring 71 is connected at one end to said pin and isconnected at' its opposite end to a depending ear 72 formed on thedevice 59. A spring 7 3 surrounds the pivot rod' 62 and bears atone endagainst the bottom of the pivoted device and at its opposite end againstthe cross bar or web-64 of the platen frame, thus tending to maintainthe pivoted device, and the stop carried thereby, in the normal positionshown in Fig. 2.

From the foregoing description it will be understood that the pull ofthe spring 71 is exerted to draw the stop 58 to the limit of itsmovement towards the right on the pivoted device or key 59, as shown inFig. 2, and that the pin and slot or sliding connection between the stop.58 and its key 59 constitutes a lost motion connection.

in Fig. 2 to that of the mechanism the operator may grasp the hook-likeportion 60 of the pivoted device, pressing it down around its pivot .62from the position shown indicated in Fig. 3, thereby forcing the nose ofthe stop'or pawl 58 into engagement between twoof the teeth on the rack56. The operator may then exert a In the operation pressureon thecarriage from left to right This pressure may be exerted at thetermination of the downward movement through the hook-like part 60, sothat one hand of the operator may be employed to eflect, by one motion,both the pivotal downward movement. of the pivoted device to engage thestop members and to inove the carria e to the right. Or, if desired, theother hand of the operator may be employed to move the carriage to theright in the usual manner while the pivoted deviceis maintaineddepressed with the other hand. The effect of the movement of thecarriage towards the right in the manner described is to move thecarriage for a limited distance relatively to the stop 58 while thelatter is held in engagement with it coiiperating rack 56. The partsthus far shown and described are so construct'ed and arranged that thismovement corresponds to a letter space movement of the carriage,although this distance may be varied by changing the extent of motionbetween the carriage and the stop 58, as, will hereinafter more clearlyappear. During the movement of the carriage to the right in the mannerdescribed. the teeth of the feed rack 5 will deflect the loose dog outof engagement. therewith, moving the carrier around the axis of itspivot 16. The extent of right-hand movement of the carriage issufficient to move the feed rack 5'the distance between two teeththereof so that the loose dog will be disengaged from one tooth age thenext tooth to'the left thereof when t e right-hand movement of thecarriage is arrested or when the carriage has moved from the positionshown in Fig. 3 to that indicated in Fig. 4 and the engagement thuseffected will retain the carriage in the position to which it has beenmoved baekwardly. On reference to these figures it will be seen that theprinting point on the platen is at the point 35 on the carriage scalebefore the movement takes place and is at the point at on the carriagescale after the movement has been effected. If pressure at this time iswithdrawn from the pivoted device, it will be restored by its spring 7 3to the normal position, shown in Fig. 2, and the carriage will bearrested at 34 on the carriage scale by reason of the feed dog 7 beingagain'in engagement with the feed rack 5.

From the foregoing description it will be understood that the downwardmovement of the pawl or stop 58 into engagement with its cooperatingrack or stop member 56 has no effect upon the carriage but is merelyeffective to'abring-the stop or pawl 58 into cooperation with the rackand that the movement of the carriage from left to right after thisengagement takes place is effected by an independent pressure applied tothe carriage either through the fin er piece 60 or in any desirablemanner. ifter the pawl 58 has engaged its cooperatin rack 56 and thecarriage has been moved re atively thereto a letter space distance tothe right, a disengagement will allow the restoring spring 71 to forcethe pawl 58 to the right and back to its nor.- mal position shown inFig. 2, one letter space distance. tion to afiord another letter spacemovement of the carriage to the right when it is again depressed and thecarriage is moved to the right. In this fnanner the carriage may bestepped .backwardly to the right a letter space distance at eachdepression of the pivoted device 59.

I have shown another and preferred form of my device in Figs.'7, 8, 9and 10 of the drawings, wherein the as those hereinbefore referred toexcept that thepawl 58 and carriage may have .a. relative movement of aplurality of letter space distances, means being provided forcontrolling at will the extent of this movement to the distance of oneor more letter spaces. In the present construction a relative movementof either one or two letter space .dis-' tances between the pawl, 58 andthe carriage may be affordetL- although it should The pawl is then inposi-- parts are the same understood that the number of letter spacedistances which the pawl or stop 58 and the carriage may move relativelyto each other may be varied as desired. The slot 74 in the carrier 68for the stop 58 is long enough to afford a double letter space movementof the stop, and headed screw- 66 passes through the slot and takes'intoa threaded opening in the side 61 of the pivoted device or key 59. Thepivot 62 for said device constitutes a support for the lefthand end-ofthe carrier 68 as in the device .previously described and alsoconstitutes a end to a screw pivot 80 which projects latershoulder 77 onthe carrierof 'the stop double letter space movement of the between thestop 58* exerted upon the carria ally from the stop 75. A spring 81surrounds the pivot rod 62 and bears at one end against the cross bar64: and at its other end 82' against the under side of the stop 75, thustending to force the free end of the stop upwardly to the position shownin Fig. 8-

where it is adapted "'to co-act with the and limit the movement of thestop towards the left. The carrier for the stop 58 is connected to asprin 71 as in'the'construction heretoforedescri ed. Should theoperatordesire merely to secure a single letter space movement at eachdepression of the pivoted device 59, it is merely necessa'ryto' actuatesaid device in the manner hereinbefore described in connection with theconstruction shown in the. preceding figures. If, however, the operatorshould desire to secure a carriage to the right, at each depression ofthe pivoted device 59, it is necessary to depress the key or fingerpiece 78' at'the same time that the pivoted device 59 is depressed,thereby removing the stop 75 from the path of the shoulder 77 so-thatthe relative movement andthe carriage will betwice the extent of thatafforded when the sto'p 75 is in the obstructing position shown in Fig.8. When the stop '75 is removed from the path'of the shoulder 77 andthepivoted device 59 is depressed to they operative position'shown inFig. 7, pressure ge fromleft to right will'force the carriageindependently of the stopdevice 58 and its cooperating rack adistancecorr'esponding to two letter spaces and the stop 75 will bemoved with the car-- 'riagejbeyond the shoulder 77, as shown in Fig4 7."This double letter space movement given-to the carriage will cause thefeed rack to move a distance correspondin to two of its teeth and the.loose dog wil rengage has been eifected and will hold the carriageagainst the tension of its spring in the tion to which it has beenmoved;

From the foregoing description it will be understood that the stop.device or pawl 58 posi- (or 58*) and the rack '56, which may likewise beregarded as a step-by-step'device,

constitutes normally out of cobperative relation and do,

not interfere with the movement of. the carriagein either direct-ionnordo they affect the escapcment mechanism !of the machine but theymay bebrought into coiiperation at any point in the travel'of the-carriage andthat the pin andslot connection between the pawl 58 (or 58?) and the keyor pivoted device 59 which carries it constitutes a lost I motionconnection betweenithe stop and its carrier which aflords a step-by-stepbackward movement of the carriage.

by LettersPatent, is

1. In a typewriting machine, the combi- What I claim as new and desire.to secure means independent of the'escapement mechanism of the machinefor limit-v.

nation of a carriage, feed devices for afford ing a step-by-step feed ofthe carriagefrom right to left, and stop devices inoperative to move thecarriage but effective for limiting step by step retractive movementsthereof when said stop devices arebrought into engagement and a backwardpressure isthen applied to the carriage, said stop devices beingcooperative at any point in the travelof the carriage. v

2(In a typewriting machine, the combination of a carriage, feed devicesfor affording a step-by-step feed of the carriage from right to left,and stop devices inoperative to move the carriage but effective forlimiting step by step retractive movements thereof, said stop devicesbeing coiiperative at any point in the travel of the carriage and beingarranged for engagementbefore backward i 115 pressure is appliedtoithecarriage. v

3. In a typewriting machine, the combination-of a carriage, escapcmentmechanism therefor, a key actuated engaging member independent of theescapcment mechanism and carried bythe carriage, a coiipera'tingengaging member carried by theframe of. the machine, said members beinginoperative to move thetcarriage but adapted to be brought intoengagementby an actuation of the key'actuated member at any point in thetravel of the carriage, and means for-affording a predetermined extentof retractive movement of the carriagerelative to said tennation ofacarriage, escapement mechanism therefor, a stop member carried by thecarriage, a cooperating stop member carried by the frame of themachine,.said stop members being independent of the escapement'mechanismand adapted to be brought into cooperative engagement at any point inthe travel of the carriage, and a lost motion connection between one ofsaid engaging members and the part that carries it, said lost motionconnection affording a retractive movement 'of thecarriage"independently of said stopmembers fora predetermined eX- tentfrom any point in thetravel of the carriage when it retractive pressureis applied to the carriage.

5. In a typewriting machine the combination of a carriage, escapementmechanism. therefor, a stop inoperative to move the carriage, acooperating rack, said stop and rack being independent of the escapementmechanism, and means for affording a predetermined extent of movement oft me of said stop andrack members on its support for the purpose oflimiting the retraptive movement of the carriage when presspre isseparately applied thereto:

' (3. The combination with .the "paper car-' riage of a-typewriter, of aplaten, a shift. rail therefor, a rack connected with the shift rail, 'amovablestop inoperative to move the carriage, and'means for causing theengagement between said stop and rack for the purpose of limiting theretractive movement of the carriage and leaving it in a position one ormore letter spaces nearer the begin ning of theline than it was beforethe engagement between the stop and rack and the retraction of thecarriage occurred.

. .7. In a typewriting machine, the combination of a carriage,escapement mechanism therefor, a stop member, carried by the car riageand independent of said escapement mechanism, a cooperating sto membercarried by the frame of the machine, said stop members being inoperativeto move the carriage and'normally out of cooperative relation butadapted to be brought into cooperation at ,any point in the travel ofthe carriage, means for affording a lost motion between one of said stopmembers and its support to afford a step-by-step backward feed of thecarriage.

' 8. In a typewriting' machine, the combination of a carriage,letterspacing mechanism therefor, and back-spacing mechanism independentof said {letter spacing mechanism for atfordinga'step-by-step back feedof the carriage, said back-spacing mechanism comprising a stop carriedby the carriage a cooperating stop carried by the frame of 't 18machine, said stops being inoperative to move the carriage and normallyout of cooperative relation but adapted to be brought into cooperationat any point in the travel of the carriage, a lost motion connectionbetween one of said stops and the part that carries it, and a spring forrestoring said last mentioned stop to its normal position relatively tothe part that carries it.

9. In a typewriting machine, the combination of a carriage, letterspacing mechanism therefor, and back spacing mechanism independent ofsaid letter spacing mechanism for affording a step-by step back feed ofthe carriage, said back-spacing mechanism comprising a stop carried bythe carriage, a cooperating stop carried by the frame of the machine,one of said stops being in the nature of a rack and the other be- "ingin the nature of a pawl, said stops being inoperative to move thecarriage and normally out of cooperative relation but adapt- -ed to bebrought into cooperation at: any

point in the travel of the carriage, a lost motion connection betweenone of said stops and the part that carries it, and a spring forrestoring said last mentioned stop to its normal position relatively tothe part that carries it. I

10. In a typewritingmachine, thecombination ofacarriage, letter spacingmechanism therefor, and back spacing mechanism independent of saidletter spacing mechanism for affording a step-by-step back feed of thecarriage, said back-spacing mechanism comprising a stop carried by thecarriage, a cooperating stop carried by the frame of the machine, one ofsaid stops being in the nature of a rack and the other being in thenature of a pawl, said stopsbeing inoperative to move the carriage andnormally out of cooperation, a key for bringing said travel of thecarriage, and a lost motion con nection between one of said stops and thpart that carries it.

11/ In a typewriting machine, the combination of a carriage, letterspacing mechanism therefor, and back spacing mechanism inde endent ofsaid letter spacing mechanism or affording a step-by-step back feed ofthe carriage, said back-spacing mechanism comprising a stop carried bythe carriage, a cooperating rack carried by the frame of the machine,and a'lost motion connection between said stop and the part that carriesit so that the carriage may move independently of said stop.

12. In a typewriting machine, the combination of acarr'iage, letterspacing mechanism therefor, and back spacing mechanism independent ofsaid letter spacing mechanstops into cooperation at any point in thekey, a lost motion connection between said tending to maintain anormalrelation be which said stop cooperates to limit the backwardmovement of the carriagewhen an engagement is effected between said stopand rack, the extent of lost motion between the stop and key determiningthe extent of' backward movement that may be given to the carriage ateach-operation;

'13, In a typewriting machine, the combination of a carriage, letterspacing mechanism therefor, and back spacing mechanism for affording astep-by-step back-feed-of-the carriage, said back-spaeing mechanismcomprising a keycarried by the carriage, a stop carried by said key, alost motion connec; tion between said stop ,andtkey, a spring tween saidstop and key,- and a rack carried by the frame of the machine and withwhich said stop cooperates to limit the b ackf ward movement of thecarriage when an engagement is effected between said stop and 25- rack,the extentof lost motion between the stop and key determining-the extentof backward movementthat may begiven to they carriage at each operation.

14. In "a typewriting machine, the com;- bination of a carr1age; aplaten carr ed thereby, a shift rail for said platen, carriage feedmechanism and back spacing mechanism, said backspacing mechanismcomprising a key carried by the carriage, a stop, a lost-motionconnection.between said stop and key for affording a backward-movef mentof the carriage, and a rack connectedwith said shift rail and with whichthe stop is adapted to be brought into cooperation at any point in thetravel of the carriage 15. In a typewriting machine, the combination ofv a carriage; a- .platen carried thereby; a shift rail for said platen;car riage feed mechanism; and back spacing mechanism,'.said backgspacingmechanism comprising a pivoted key carried by the carriage, a stop, asliding jconneetion between said stop and key for affording a backwardmovement ofthe carriage, a spring for restoring-the sliding stop tonormal position on the pivoted key, and a rackcarried by. said shiftrail and with which thestop is adapted to be brought into cooperation atany point in the travel of the Icarria e.

-16. In a typewriting maehine,'-t e combination of a "carriage; "aplaten adapted to be shifted for upper and lower case writing; ,a shiftrail for said platen;- carriage feed mechanism; and back-spacingmechanism for affording a step-by-step backward feed' of the carriage,said baek=spacing mechanism-comprising a pivotedspring restored 'key-carr1ed by thecarriage, a stop', -a sliding connection between said,stop and key for affording a backward movement of the;

cereals sang for restoring the sang 2 stop m Position: on the pivotedkey, ands-rack ne e hsaid shift-rail and bination of a carriage, astopmember carried by the carriage, a" cooperating stop member carriedby the frame of the ma- 'chine, said stop members being normally out ofcooperative relation and adapted to be' brought into cooperation at anypoint in the travel of the carriage, means for afiording.

a lost motion between one of said stop'members and its support ,toafford a step-by-step backward feed of the carriage,"and means forvarying the extent of said lost motion.

'18; In-a typ'ewriting machine, the combination of. a carriage, .a stop.member car ried by the carriage, a cooperating stop =membercarried bythe frame of the machine, saidstop members being'normally out ofcooperative relation but adapted to be brought I into cooperation at anypoint'in the travel of the-carriage, meansfor affording a. lost motionbetween one of said stop-membersand its support to afford a stepby -stepbackward feed of the carriage, and hand controlled means for affording.different extents of lost motion as may be desired.

-19 In a typewriting 'machine,;ljthe com: bination of a"carriage, a stopmember car-,' ried. by the carriage, a cooperating stop member carriedby the frame of the machine, 3

said stopmemberslbeing normally out of co operative relation butadapted. to'be brought; r

intocooperation at any point'in the travel of the carriage,-means foraffording a lost motion between; one of said stop members and itssupport to; afford" a step by step sing'le letter space backward feed ofthe carriage, and hand controlled means for in' creasing the extentoflost motion at will.

201 Ina typewritingmachine,,the combination of a carriage, a stop membercarried' by the carriage, a cooperating stop it lost'motion at will. a

21,-In 'a typewriting machine, the combination' of a carriage, 1a stopmember car. 'ried by the carriage, a cooperating stop mm-ber carried bythe frame of the machine,

said stop members being no out of coriage, and spring restored keyactuated I means for affording an i ncreasedf extent -of' "1 operativerelation but adapted to be brought into cooperation at any point in the,travel of the carriage, means for affording a lost motion between one ofsaid stop members and its support to afford a step-by-step backward feedof the carriage, a movable limiting stop normally in the path of the.lost motion stop member, and means for moving said limiting stop out ofthe path of said lost motion .stop member.

22. In a typewriting machine, the combination of a carriage, a stopmember carried by the carriage, a cooperating stop member ca'rriedby theframe OftllfijlllitClllllQ, said stop members being normally out ofcooperative relation but adapted to be brought into cooperation at'anypoint in the travel of the carriage, means for affording a lost motionbetween one of said stop members and its so port to afford astep-by-step backward fee of the carriage, a pivoted spring restoredlimiting stop normally in the path of the lost motion stop member, and akey connected (to said limiting stop to move it gut of the path of the10st motion stop mem- 23. In a typewriting machine, the combination of acarriage; letter spacing mech-' anism therefor; and back spacingmechanism for affording a step-by-step back feed of the carriage, saidback-spacing mech-' anism comprising a stop carried by the carriage, acooperating stop carried by the frame of the machine, said stops beingnormally out of cooperative relation but adapted to be brought intocooperation at any point in the travel of the carriage, a lost motionconnection between one of said stops and the part that carries it, aspring for restoring said last mentioned stop to its normal positionrelatively to the part that carries it, and a hand-controlled movablelimiting stop normally in'tlrepath of that stop which 7 ha salostmotionconnection, whereby the extent of lost motion may be varied.

- 24:. In atypewriting machine, the combination of a carriage; letterspacing mechanism therefor; and back spacing mechanism for affording astep-by-step back feed of the carriage, said back-spacing mechanismcomprising a stop carried by the carriage, a cooperating 'rack' carriedby the frame of the machine, a lost motion connection between said stopand the part that carriesit, and means for varying the extent ofmovement afforded by said lost motion connection.

25. In a typewriting machine, the combination of a carriage; letterspacing mechanism therefor; and back spacing mechsaid stop andtkey,means for varying the extent of lost motion between said stop and key,and a rack with which said step coiipcrates to limit the backwardmovement ofthe carriage when an engagement is effected bet-ween saidstop and rack, the extent of lost motion between the stop and keydetermining the extent of backward movement that may be givento thecarriage at each operation.

26. In a typewriting machine, the com-- mg the extent of lost motionbetween said stop and key, and a rack carried by the frame of themachine and with which said stop cooperates to limit the backwardmovement of the carriage when an engagement is effected between saidstop and rack, the extent of lost motion between the stop and keydetermining the extent of backward movement that may be given to thecarriage at each operation.

27. In a typewriting machine, the combination of a carriage: a platencarried thereby; a shift rail for said platen; carriage feed Imechanism; and back-spacing mechanism, said back spacing mechanismcomprising a key carried by the carriage, a stop, a lost motionconnection between said stop and key for affording a backward movementof -thecarriage,means for varyingthe extent of lost motion between saidstop and key, and a rack connected with said shift rail and with whichthe stop is adapted to be brought into cooperation at any point in thetravel of the carriage.

28. In a-typewriting machine, the combination of a carriage; a platencarried thereby; a shift rail for said platen; carriage feed mechanism;and back spacing mechanism; said back spacing mechanism comprising apivoted key carried by the carriage, a stop, a sliding connectionbetween said stop and key for affording a backward movement of thecarriage, means for varying the extent of lost motion between said stopand key, a

spring for restoring the sliding stop to normal position 011 the pivotedkey, and a rack connected with said shift rail, and with which the stopis adapted to be brought into cooperation at any point in the travel ofthe carriage.

29; In a typewriting machine, the combination of a carriage; a platenadapted to be shifted for upper and lower case writing; a shift rail forsaid platen; carriage" feed mechanism; and back spacing mechan-' ism foraffording a step-by-step backward feed of the carriage, said backspacing mechanism comprising a pivoted spring restored 3 key carriedbythe carriage, a stop, a sliding carriage to maintain the stop fixedwhile the carriage. receives a backward movement for a predeterminedextent.

Ina typewritingmachine, the combination of a carriage; letter spacingmec'han ism therefor; and back spacing mechanism for affording astep-by-step backward feed of the carriage said back spacing-mechanismcomprising a key, a stop carried by said key, a lost motion'connectionbetween said stop and key, a second key carried by said first mentionedkey, a regulating stop controlled by said second key and cooperatingwith said first mentioned stopto limit its -movement, and a stop memberthat cooperates-with said first mentioned stop to limit 4 the backwardn'iovenlent of the carriage.

I nation of a carriage; letter spacing mechan lsm therefor; and backspacing mechanism 31. In a typewriting machine, the combifor aifording astep-by-step backward feed of the carriage, said back spacing mechanismcomprising a key,a stop-carried by said key, a lostvmotion connectionbetween said stop and key, a second key carried by said first mentionedkey, a regulating stop controlled by said second key andcooperating-with said first mentioned stop to vary'the extent of lostmotion between said first mentionedl stop and its key, and a'rackwithwhich said first mentioned stop cooperates to limit the backwardmovement of the carriage.

. 32. In a typewriting machine, the combination of a carriage; and backspacing mechanism therefor; said back spacing mechanism comprisingcooperating stop members that are adapted to be brought into cooperationat any point in the travel of the carriage to afford a step-bystep.backward movement of one or more letter spaces as may be desired at eachactuation, and keys cooperating with said stop members, one of said keyscontrolling the stop members to afford a single letter step-by-stepbackward feedtof the'carriage and the other key being operable to afforda movement of the carrlage for a plurality of letter-space, distances ateach step-by-step feed.

33. In a typewriting machine, the combi: nation ofa carriage; and backspacing mechanism therefor, said back spacing mechanism comprising ,arack, cooperating stop members, one of said stop members being adaptedto be brought into cooperation with the rack at any point in the travelof the carriage to afford a step-by-step backward movement' of one ormore letter spaces as maybe desired at each actuation, and keyscooperating with said stop members, one of said keys controlling theengagement of one of said stop members with the-rack to afford a singleletter step-by-step backward feed of the carriage and the other key,co-acting with the other stop member to afiord a movementof the carriagefor a plurality of letter space distances at each step-by-step feed.

Signed at the borough of Manhattan, city of New York, in the county ofNew York, and State of New York, this 17th day of April A. D. 1906. rWALTER J.v BARRON. Witnesses:

E. M. WELLs, M. F. HANMOEBER.

